US20080084117A1 - Methods and apparatuses for operating devices with solar power - Google Patents
Methods and apparatuses for operating devices with solar power Download PDFInfo
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- US20080084117A1 US20080084117A1 US11/544,103 US54410306A US2008084117A1 US 20080084117 A1 US20080084117 A1 US 20080084117A1 US 54410306 A US54410306 A US 54410306A US 2008084117 A1 US2008084117 A1 US 2008084117A1
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- power
- voltage converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- the computer system 1000 which is a form of a data processing system, includes a bus or interconnect 1002 which is coupled to one or more microprocessors 1003 and a ROM 1007 , a volatile RAM 1005 , and a non-volatile memory 1006 .
- the microprocessor 1003 which may be, for example, a PowerPC G4 or PowerPC G5 microprocessor from Motorola, Inc. or IBM, is coupled to cache memory 1004 as shown in the example of FIG. 10 .
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
- The present invention relates generally to electronic devices. More particularly, this invention relates to operating portable electronic devices with solar power.
- Handheld computing devices typically use standard battery chemistries including ni-cad, lithium-ion, and nickel-metal hydride. In order to recharge these batteries, operators may use standard recharging options such as, for example, conventional AC (alternating current) outlets. However, mobile users who are in remote locations oftentimes do not have access to conventional AC outlets. As a result, they oftentimes have no way of recharging the batteries of their handheld computing devices.
- Recently, solar power has been used to power up a handheld device. As demands for the power of the handheld computing devices increase, it becomes more important to provide stable power to the devices. However, given the characteristics of the solar cells that provide solar power, it is relatively difficult to track the solar power drawn from the solar cells to maintain relatively stable solar power output.
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FIG. 1A is a diagram illustrating a model circuit of a typical solar cell. As shown inFIG. 1A , the I-V equation for the diode part of the model can be written as follows: -
- The I-V curve for the cell may be described as follows:
-
- Similarly, the V-I curve may be described as follows:
-
- For a typical cell the Cell current is about 1 Amp at 650 mV so I0 can be computed to be 1.389×10−11.
FIG. 1B is a diagram illustrating an example of the V-I characteristic of a solar cell. The output is similar to a current limited voltage source. The power out of the cell at any given point on the V-I curve is the voltage times the current.FIG. 1B also includes a plot of the available cell power plotted as a function of voltage. As shown inFIG. 1B , there is a fairly sharp peak operating power that is the desired operating point for maximum power out. -
FIG. 2A is a schematic diagram illustrating a typical solar power system using a boost switching regulator and a storage battery. Referring toFIG. 2A , the boost regulator would be used in low cell count systems where the battery voltage is larger than the available cell voltage. The boost regulator boosts the solar cell voltage to a voltage suitable for a conventional battery charger. A controller monitors the current into the battery charger and controls the current drawn by the charger to control the power draw from the solar cell. Since the output voltage is constant the power to the battery charger is proportional to the current drawn so the control be considered to be a power control and the solar cell sees the converter as a adjustable constant power load as illustrated inFIG. 2B . -
FIG. 3A is a diagram illustrating a cell V-I source plot with a resistor load line and some constant power load lines. Referring toFIG. 3A , the resistor load is always stable since both the source and load resistances are positive. The constant power loads are conditionally stable. The 600 mW load is always unstable because there is no intercept with the cell V-I curve. The 400 mW and 500 mW loads are stable at the Intercept B locations because the positive conductance of the cell is greater than the negative conductance of the load. These loads are unstable at Intercept A. With the 600 mW load the load will continue to demand current that the cell cannot supply so the cell will go into constant current mode and the cell voltage will go down. This similar situation will apply to the other two loads if cell voltage is below Intercept A; however, if the cell voltage is above Intercept A, the cell voltage will increase and finally settle at Intercept B. -
FIG. 3B is a diagram illustrating a SPICE simulation result that shows the behavior of the system when the load current is stepped up in 0.5 mA steps from a load current of about 75 mA. At each step the cell voltage drops by an increasing amount and when the peak power point is exceeded so there is no intercept, the system collapses. The controller inFIG. 2A must sense the impeding collapse and recover before the actual collapse occurs. - In addition, a conventional portable device or handheld device typically includes a battery and an AC adaptor for charging the battery. Certain handheld devices, such as a calculator, include a solar panel to generate solar power to activate the device. However, such a device does not normally include other power sources to charge the battery. Sometimes the solar power source or AC outlet may not be conveniently available. In such circumstances, a device limited to one charging method may not function properly.
- Techniques for operating devices with solar power are described herein. In one aspect of the invention, apparatus for operating a portable electronic device with solar power includes, but is not limited to, a voltage converter and a controller coupled to the voltage converter. The voltage converter includes an input capable of being coupled to a solar power source and an output capable of being coupled to an electronic load, such as, for example, a portable electronic device. The voltage converter is configured to monitor or detect an amount of power drawn by the electronic load at the output of the voltage converter. In response to the monitored power drawn, the controller is configured to control the voltage converter to adjust further output power provided to the electronic load. As a result, the output voltage from the solar power source is maintained within a predetermined range.
- According to another aspect of the invention, a portable electronic device includes, but is not limited to, a processor, a memory coupled to the processor for storing instructions, when executed from the memory, cause the processor to perform one or more functions, a battery coupled to provide power to the processor and the memory, and a battery charging manager coupled to charge the battery using power derived from a plurality of power sources including a solar power source.
- Other features of the present invention will be apparent from the accompanying drawings and from the detailed description which follows.
- The present invention is illustrated by way of example and not limitation in the figures of the accompanying drawings in which like references indicate similar elements.
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FIG. 1A is a diagram illustrating a model circuit of a typical solar cell. -
FIG. 1B is a diagram illustrating characteristics of a typical solar cell as shown inFIG. 1A . -
FIG. 2A is a schematic diagram of a conventional solar power circuit. -
FIG. 2B is a schematic diagram of a module for a conventional solar power circuit as shown inFIG. 2A . -
FIGS. 3A-3B are diagrams illustrating certain characteristics of circuits as shown inFIGS. 2A-2B . -
FIGS. 4A-4B are schematic diagrams illustrating systems for operating an electronic device with solar power according to certain embodiments of the invention. -
FIGS. 5A-5B are diagrams illustrating certain characteristics of circuits as shown inFIGS. 4A-4B . -
FIG. 6 is a schematic diagram illustrating a system for operating an electronic device with solar power according to an alternative embodiment of the invention. -
FIG. 7 is a flow diagram illustrating a process for operating an electronic device with solar power according to one embodiment of the invention. -
FIGS. 8A-8D are block diagrams illustrating examples of portable electronic devices having a power interface for various power sources, according to certain embodiments of the invention. -
FIG. 9 is a flow diagram illustrating an example of a process for interfacing a portable device with a variety of power sources according to one embodiment of the invention. -
FIG. 10 is a block diagram of a digital processing system, which may be used with one embodiment of the invention. - In the following description, numerous details are set forth to provide a more thorough explanation of embodiments of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the present invention may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring embodiments of the present invention.
- Reference in the specification to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase “in one embodiment” in various places in the specification do not necessarily all refer to the same embodiment.
- According to certain embodiments of the invention, an amount of power drawn at the point of a load of solar power is monitored and the monitored power is used to control a voltage converter that provides regulated power. For example, contrary to conventional approaches where the voltage of an output of a solar power source is monitored and used to control a charger to consume the solar power, the amount of power (e.g., an amount of current or voltage into a load with known characteristics) being drawn is monitored at an input of an electronic load, such as, for example, a battery or a battery charger that utilizes the solar power to charge and/or recharge the battery is monitored. Based on the monitored power drawn, a controller (e.g., a programmable microcontroller) is invoked to determine statuses of the solar power sources and to generate a control signal using a predetermined algorithm, in response to the monitored power being drawn by the electronic load. The control signal is used to control the voltage converter to adjust further amount of power to be drawn by the electronic load. The above operations may be performed via hardware, software, or a combination of both.
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FIG. 4A is a block diagram illustrating an example of an apparatus for operating an electronic device with solar power according to one embodiment of the invention. In one embodiment, the apparatus includes, but is not limited to, a voltage converter and a controller coupled to the voltage converter. The voltage converter includes an input capable of being coupled to a solar power source and an output capable of being coupled to an electronic load, such as, for example, a portable electronic device. The voltage converter is configured to monitor or detect an amount of power drawn by the electronic load at the output of the voltage converter. In response to the monitored power drawn, the controller is configured to control the voltage converter to adjust an amount of power to be drawn subsequently. As a result, the output voltage from the solar power source is maintained within a predetermined range. - Referring to
FIG. 4A ,exemplary circuit 400 includes avoltage converter 402 and acontroller 404 coupled tovoltage converter 402. An input of thevoltage converter 402 is capable of being coupled to asolar power source 401, which may include one or more solar cells, or solar cell arrays. Thesolar power source 401 is configured to absorb energy from the light such as sun light and transform the absorbed energy into electricity. Thevoltage converter 402 is configured to convert the electricity from thesolar power source 401 into proper form of electric power that is suitable to be used by theelectronic load 403. - In addition, a
controller 404 is coupled to anode 406 coupling an input of theelectronic load 403 and an output of thevoltage converter 402. Specifically,controller 404 is configured to monitor an amount of power being drawn from the output of the voltage converter by theelectronic load 403. For example, thecontroller 404 may be configured to monitor an amount of current being drawn by theelectronic load 403, for example, using a current sense resistor (not shown). Alternatively, thecontroller 404 may be configured to monitor the voltage ofnode 406 coupling theelectronic load 403 and thevoltage converter 402, or a combination of both voltage and current being drawn atnode 406. - In response to the monitored power being drawn, according to one embodiment, the
controller 404 determines the statuses ofsolar power source 401. For example, based on the monitored power being drawn at node 306, thecontroller 404 is able to determine whether the maximum power that thesolar power source 401 can generate has been reached, given the characteristic of thesolar power source 401, such as, for example, characteristics similar to those shown inFIGS. 1A and 1B . Alternatively, in response to the monitored power being drawn, thecontroller 404 determines whether an output voltage of thesolar power source 401 has dropped below a predetermined threshold in view of certain characteristics ofsolar power source 401. - Based on the determined statuses of the
solar power source 401, according to one embodiment, thecontroller 404 is configured to generate a control signal to control thevoltage converter 402. In response to the control signal received from thecontroller 404, thevoltage converter 402 is configured to adjust a subsequent amount of power to be drawn by theelectronic load 403, such that the output of thesolar power source 401 may be maintained within a predetermined range. - In one embodiment, the
controller 404 is a programmable controller that may be programmed to perform the determination described above based on a predetermined algorithm. For example,controller 404 may include a machine-readable storage medium (not shown) to store one or more machine instructions. In response to the monitored power being drawn, thecontroller 404 is configured to execute the one or more machine instructions stored therein to determine the status of thesolar power source 401. The one or more machine instructions may include one or more executable routines, which may be programmed and stored in the machine-readable storage medium ofcontroller 406. The one or more routines may be used to generate the control signal based on the monitored power being drawn using a predetermined relationship between the monitored power and one or more characteristics of thesolar power source 401, such as, for example, a diagram as shown inFIGS. 5A and 5B according to certain embodiments of the invention. - In one embodiment, the
solar power source 401 may be integrated with theexemplary circuit 400. Alternatively, thesolar power source 401 may be implemented external to theexemplary circuit 400 and is capable of being interfaced with theexemplary circuit 400. Note thatsolar power source 401 is used herein as an example for the purposes of illustration only. Other types of power sources may also be applied. - The
electronic load 403 may include, but is not limited to, a portable electronic device, such as, for example, a notebook/laptop computer, a media player (e.g., MP3 or video player), a cellular phone, a personal digital assistant (PDA), an image processing device (e.g., a digital camera or video recorder), and/or any other handheld computing devices, or a combination of any of these devices. Theelectronic load 403 may further include a battery and/or a battery charger to charge or recharge the battery using the electric power generated/converted from thesolar power source 401. - Similarly, according to one embodiment,
electronic load 403 may be integrated withcircuit 400. Alternatively,electronic load 403 may be implemented external to circuit 300 and is capable of being interfaced with theexemplary circuit 400, such as, for example, via a dedicated power interface or via a shared communication interface (e.g., network interface, etc.) Other configurations may exist. -
FIG. 4B is a simplified schematic diagram illustrating an apparatus for charging a battery from a solar cell, according to one embodiment of the invention. For example,exemplary circuit 450 may be implemented as an embodiment ofcircuit 400 ofFIG. 4A . - According to one embodiment, similar to
circuit 400 ofFIG. 4A ,exemplary circuit 450 includes, but is not limited to, avoltage converter 452 having an input coupled to a solar power source, such as, for example, solar cell orcells 451. Thevoltage converter 452 includes an output coupled to anelectronic load 453, which may include a battery, battery charger, and/or a portable electronic device as described above. In one embodiment,voltage converter 452 includes, but is not limited to, a power switching device, in this example, having switches 456-457, and a switching regulator 455 (in this example, a pulse width modulator or PWM) to control a switching duty cycle of the power switching device (e.g., switches 456-457). Note that a switching device may be a FET (field effect transistor) or a bipolar transistor, etc. Since thePWM 455 can be implemented by digital logic or a programmed process then thePWM 455 can be contained in thecontroller 454. - In addition,
voltage converter 452 further includes an energy storage device, in this example, aninductor 458, to store energy during a switching duty cycle. Further,exemplary circuit 450 may further include another energy storage device, in this example, acapacitor 459, to temporarily store energy derived from thesolar power source 451, particularly, during an initialization phase of thevoltage converter 452. - Furthermore,
exemplary circuit 450 further includes an output power sensing circuit to sense the power being drawn by theelectronic load 453. The sensing circuit may include a current sensing device and/or voltage sensing device. In this example, the sensing circuit includes acurrent sensing resistor 461 and acurrent sensor 460. Thecurrent sensing resistor 461 is coupled in series between an output of thevoltage converter 452 and an input of theelectronic load 453. Typically,current sensing resistor 461 is a relatively high precision resistor, where an amount of current flowing through theresistor 461 can be measured by measuring a voltage drop across thecurrent sensing resistor 461, for example, bycurrent sensor 460. Since the load is a battery the voltage of the load is constant so the power is proportional to the current. The change in power can then be used to determine that the maximum power available from the solar cell is being transferred to the load. - An output of the
current sensor 460 may be input tocontroller 454 viapath 462, where thecontroller 454 may generate a control signal based on the input received fromcurrent sensor 460.Controller 454 may be programmable controller (e.g., FPGA) having a machine storage medium (e.g., EEPROMs or electrically erasable programmable read-only memories, etc.) therein for storing instructions, which when executed from the machine storage medium, cause the controller to perform certain operations, including at least generating the control signal based on the current sensing information received from thecurrent sensor 460. The operations may be implemented using a predetermined algorithm and/or according to certain information or condition stored in a lookup table within the controller. - Note that the specific algorithm employed by the programmable instructions may be tailored to or based on a specific operating environment and/or characteristics of the
electronic load 453. The control signal generated from thecontroller 454 may be used byPWM 455 to adjust further switching duty cycles of the power switching device (e.g., switches 456 and/or 457). Optionally, output voltage may also be monitored and input tocontroller 454 viapath 463, for example, to prevent a battery overcharged. Note that in this example, circuit does not have to include a battery charger although one could be added or thecontroller 454 could be programmed to manage the charging. - In a particular embodiment, switch 456 may be an n-channel MOSFET (NMOS) and switch 457 may be a p-channel MOSFET (PMOS). The NMOS and PMOS FETs act as switches that are activated by a
pulse width modulator 455 such that when one switch is on, the other is off. Acapacitor 459 holds the cell voltage during the brief switching times so that the cell current ICELL is essentially constant. Theinductor 458 is used as the energy storage element for the voltage converter (e.g., a booster converter) created by theswitches 456 and/or 457. The output of the switches is connected to the electronic load (e.g., a battery) through a relatively smallsense resistor R SENSE 461 that is used with acurrent sense circuit 460 to thecontroller 454 which may be a digital control circuit with A/D converters for the current sense and/or to monitor the battery voltage VBAT. The VBAT monitor may be needed if there is a risk of battery overcharging. Thecontroller 454 then generates the pulse width modulation timing forPWM 455. Note thatexemplary circuit 450 is shown for the illustration purposes only. More or fewer components may be utilized and other configurations may also be implemented. In a particular embodiment, switching devices 456-457 may be an IRF6623 compatible power MOSFET (metal-oxide semiconductor FET), which is available from International Rectifier -
FIG. 5A is a diagram illustrating a timeline for the voltage across the inductor and the current through the inductor, according to one embodiment of the invention. As shown inFIG. 5A , it is assumed that there is some significant average current IAVE that is larger than the incremental current change ΔI. Referring toFIG. 5A , when the NMOS FET (e.g., switch 456 ofFIG. 4B ) is on (during T2), then voltage across inductor L (e.g.,inductor 458 ofFIG. 4B ) is VCELL (ignoring switch drop) so that the current may increase approximately by: -
- When the PMOS FET (e.g., switch 457 of
FIG. 4B ) is on (during T1), then the voltage across inductor L (e.g.,inductor 458 ofFIG. 4B ) is VBAT-VCELL and the current change during this time is approximately: -
-
-
- The result is illustrated in
FIG. 5B . The pulse width modulation will set a voltage operating point on the current and power curves. This is now unconditionally stable and the power peak can be found without stability concerns. - A significant advantage of this approach is that it is more efficient than the approach of
FIG. 2A , because inFIG. 2A the output voltage VT must always be higher than the maximum battery voltage and there is a power loss in the charger due to the voltage difference that will not exist in the new solution since the current goes directly into the battery. Note that any appropriate power device could be used for the switching device. For example, according to one embodiment, it is also possible for the PMOS switch to be replaced with a Schottky diode as shown inFIG. 6 . -
FIG. 7 is a flow diagram illustrating an example of a process for operating a portable device with solar power according to one embodiment of the invention.Exemplary process 700 may be performed by a processing logic that may include hardware (circuitry, dedicated logic, etc.), software (such as is run on a dedicated machine), or a combination of both. For example,process 700 may be performed by systems as shown in the above figures. - In one embodiment,
process 700 includes, but is not limited to, generating regulated power via a voltage converter to power a portable electronic device based on solar power derived from a solar power source, monitoring power drawn at an output of the voltage converter by the portable electronic device, and in response to the monitored power, controlling the voltage converter to adjust further regulated power to the portable electronic device. - Referring to
FIG. 7 , at block 701, in response to an output voltage from a solar power source (e.g., a solar cell or an array of solar cells), a voltage converter (e.g., a booster converter) is configured to provide a regulated power to an electronic load (e.g., a portable electronic device, a battery, and /or a battery charger). Atblock 702, an amount of power (e.g., current and/or voltage into a load with known characteristics) drawn at the output of the voltage converter by the electronic load is monitored, for example, using a current sense device. At block 703, in response to the monitored power, adjusting (e.g., using a programmable controller) the regulation (e.g., controlling a pulse width modulator of the voltage converter) of the power further to be provided to the electronic load. Other operations may also be performed. - As a result, with some or all of the solar power tracking techniques, the output of the solar power source can be maintained within a consistent range and chances of a sharp drop of voltage or power output from the solar power source due to being overdrawn can be eliminated, in order to provide power to an electronic load with relatively high stability. Again, solar cells or solar cell arrays are used as examples for the purposes of illustration only. It will be appreciated that other types of power sources may also be applied.
- As described above, a conventional portable device typically use an AC adaptor to charge a battery of the portable device. Alternatively, a conventional portable device such as calculator utilizes a solar panel to directly power up the device. A conventional portable device lacks a flexible and smart power interface that can provide power to the portable device from multiple different power sources, including an AC/DC power and solar power sources.
- According to one embodiment, a portable electronic device includes a power interface that can provide power to the portable electronic device from a variety of different power sources based on the operating circumstances of the portable electronic device. According to certain embodiments of the invention, a portable electronic device may draw power from a traditional AC/DC power, solar power, power from a variety of communication lines (such as, for example, a network connection (e.g., Ethernet), a USB (universal serial bus) connection, or an IEEE 1394 compatible connection, also referred to as Firewire), a telephone line, or a combination of any of these power sources.
- Any of these power sources may be used to charge or recharge a battery of a portable electronic device. When a solar power source is utilized, one or more solar power tracking techniques described above may be utilized, for example, as a part of power management component or a battery charging manager of the portable electronic device. A battery charging manager of a portable electronic device is able to determine the operating environment of the portable electronic device and the availability of the various power sources. In response, the battery charging manager may select one or more of the power sources that are appropriate under the circumstances to be used to charge a battery of the portable electronic device.
- In one embodiment, a portable electronic device, which can draw power from a variety of power sources, may be a notebook/laptop computer, a media player (e.g., an MP3 or video player), a cellular phone, a personal digital assistant (PDA), an image processing device (e.g., a digital camera or video recorder), and/or any other handheld computing devices, or a combination of any of these devices (e.g., a combo device).
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FIGS. 8A-8D are block diagrams illustrating examples of portable electronic devices having a power interface for various power sources, according to certain embodiments of the invention. In one embodiment, a portable electronic device includes, but is not limited to, a processor, a memory coupled to the processor for storing instructions, when executed from the memory, which cause the processor to perform one or more functions, a battery coupled to provide power to the processor and the memory, and a battery charging manager coupled to charge the battery using power derived from a plurality of power sources including a solar power source. - Referring to
FIG. 8A , in this embodiment,portable device 800 includes, abattery charging manager 801 to manage power to be supplied to one ormore system components 803. Thesystem components 803 may include major components of a portable electronic device mentioned above. When AC power is available,power manager 801 may draw power directly from the AC power (not shown) to provide power tosystem components 803. Meanwhile, thepower manager 801 may distribute a portion of the AC power to charge or rechargebattery 802. When the AC power is not available, thebattery charging manager 801 may enable thebattery 802 to provide power tosystem components 803 for operations. - In addition,
battery charging manager 801 may draw power from a variety of power sources to charge or rechargebattery 802, which in turn may be used to provide power to thesystem components 803 subsequently or substantially concurrently. According to certain embodiments of the invention, various power sources may include power provided from a communication line or media, such as, for example, a network connection 804 (e.g., Ethernet), a USB (universal serial bus) connection 805, or an IEEE 1394compatible connection 806, also referred to as Firewire), a telephone line (not shown), or a combination of any of these power sources. - In addition, the
battery charging manager 801 may further draw power from asolar power source 809 having one or more solar cells or arrays, via theauxiliary charger 807 and/orcontroller 808. In one embodiment, theauxiliary charger 807 andcontroller 808 may be implemented using some or all of the techniques described above with respect toFIGS. 3-7 . - According to one embodiment,
battery charging manager 801 is configured to determine the statuses of various power sources 805-806 and 809, as well as other power sources (not shown). Based on the statuses of the power sources, thebattery charging manger 801 may select one or more of the power sources, individually or substantially concurrently, to charge thebattery 802. - According to certain embodiments, various external power sources (e.g., power sources 805-806) may be coupled to the
portable device 800 via one or more power interface circuits. Alternatively, these power sources may be coupled to theportable device 800 using a shared interface circuit with data connection (e.g., shared network connector, USB connector, IEEE 1394 connector, or a telephone jack, etc.) - In addition,
controller 808 may communicate with one ormore system components 803 to further enhance the solar power charging techniques based on the operating environment or statuses of thesystem components 803. Further,portable device 800 may includebattery level indicator 810 for indicating a current battery level to a user. Other configurations may exist. -
FIG. 8B is a block diagram illustrating an example of a portable electronic device according to an alternative embodiment of the invention. Unlike the embodiment as shown inFIG. 8A where thesolar power source 809 is integrated within theportable device 800, in this embodiment, thesolar power source 809 is external to theportable device 800. Thesolar power source 809 may be non-fixedly coupled to the auxiliary charger, for example, via an interface (e.g., a connector or socket). That is, thesolar power source 809, which may include a solar panel having one or more solar cells or arrays, may be plugged into and removed from theportable device 800, for example, using a cable. Theauxiliary charger 807 and/orcontroller 808 may further include plug-n-play capabilities to detect whether thesolar power source 809 is inserted and whether it is appropriate to use the power drawn from thesolar power source 809 to charge or recharge thebattery 802. In this embodiment, thesolar power source 809 may be manufactured by the same manufacturer of theportable device 800 or a third party. -
FIG. 8C is a block diagram illustrating an example of a portable electronic device according to another embodiment of the invention. Unlike the embodiments as shown inFIGS. 8A and 8B , where thesolar power source 809 and/orauxiliary charger 807 are integrated within theportable device 800, in this embodiment, thesolar power source 809 andauxiliary charger 807 are implemented as apower package 812 external to theportable device 800. Thepower package 812 becomes a portable power package that may be plugged into theportable device 800 via aninterface circuit 811, for example, using a cable. Thus, the solar power source becomes an option to theportable device 800. As a result, the cost of theportable device 800 may further be reduced, since some users may not need the solar power option. Similarly, thepower package 812 may be manufactured by the same manufacturer of theportable device 800 or a third party. -
FIG. 8D is a block diagram illustrating an example of a portable electronic device according to another embodiment of the invention. In this embodiment, thepower package 812 further includes a secondauxiliary charger 807 and anauxiliary battery 813, while theportable device 800 maintains a firstauxiliary charger 814. Thepower package 812 becomes a portable power package that may be plugged into theportable device 800 via aninterface circuit 811, for example, with or without a cable. - In this embodiment, the
auxiliary battery 813 may be charged by the secondauxiliary charger 807 using power derived from the auxiliary power source, in this example, a solar panel having one or more solar cells or arrays. Thus, the auxiliary battery may be charged while thepower package 812 is not coupled to theportable device 800. The chargedauxiliary battery 813 may then be used to charge or recharge thebattery 802, when thepower package 812 is coupled to theportable device 800. Alternatively, when thepower package 812 is coupled to the portable device 800 (e.g., via a cable), theauxiliary battery 813 may be charged by the secondauxiliary charger 807 using the solar power derived from thesolar power panel 809, while providing power to charge, viaauxiliary charger 807,battery 802 substantially concurrently.Auxiliary charger 807 may be implemented with some or all of the solar power tracking techniques described above. - Similar to the embodiment as shown in
FIG. 8C , thesolar power package 812 becomes an option to theportable device 800. As a result, the cost of theportable device 800 may further be reduced, since some users may not need the solar power option. Similarly, thepower package 812 may be manufactured by the same manufacturer of theportable device 800 or a third party. -
FIG. 9 is a flow diagram illustrating an example of a process for interfacing a portable device with a variety of power sources according to one embodiment of the invention.Exemplary process 900 may be performed by a processing logic that may include hardware (circuitry, dedicated logic, etc.), software (such as is run on a dedicated machine), or a combination of both. For example,process 900 may be performed by systems as shown inFIGS. 8A-8D . In one embodiment,process 900 includes, but is not limited to, determining statuses of a plurality of power sources available to the portable electronic device, where the plurality of power sources includes a solar power source, and selecting one of the plurality of power sources to charge a battery of the portable electronic device, including selecting the solar power source when an operating environment is appropriate. - Referring to
FIG. 9 , at block 901, multiple power sources (e.g., solar power, power received from a network connection, USB connection, an IEEE 1394 or Firewire connection, or a telephone line, etc.) are provided to charge a battery of a portable electronic device. At block 902, processing logic determines statuses (e.g., availability) of the various power sources. In response to a given operating environment of the portable electronic device, atblock 903, processing logic selects at least one of the multiple power sources that is appropriate under the circumstances to charge or recharge the battery of the portable electronic device. Other operations may also be performed. -
FIG. 10 is a block diagram of a digital processing system, which may be used with one embodiment of the invention. For example, thesystem 1000 shown inFIG. 10 may be used as a portable electronic device as described above, which may be, for example, a notebook/laptop computer, a media player (e.g., MP3 or video player), a cellular phone, a personal digital assistant (PDA), an image processing device (e.g., a digital camera or video recorder), and/or any other handheld computing devices, or a combination of any of these devices. Further,system 1000 may include a solar power tracking mechanism and/or a power interface for various power sources described above. - Note that while
FIG. 10 illustrates various components of a computer system, it is not intended to represent any particular architecture or manner of interconnecting the components, as such details are not germane to the present invention. It will also be appreciated that network computers, handheld computers, cell phones and other data processing systems which have fewer components or perhaps more components may also be used with the present invention. The computer system ofFIG. 10 may, for example, be an Apple Macintosh computer or Power Book, or an IBM compatible PC. - As shown in
FIG. 10 , thecomputer system 1000, which is a form of a data processing system, includes a bus orinterconnect 1002 which is coupled to one ormore microprocessors 1003 and aROM 1007, avolatile RAM 1005, and anon-volatile memory 1006. Themicroprocessor 1003, which may be, for example, a PowerPC G4 or PowerPC G5 microprocessor from Motorola, Inc. or IBM, is coupled tocache memory 1004 as shown in the example ofFIG. 10 . Thebus 1002 interconnects these various components together and also interconnects thesecomponents display device 1008, as well as to input/output (I/O)devices 1010, which may be mice, keyboards, modems, network interfaces, printers, and other devices which are well-known in the art. - Typically, the input/
output devices 1010 are coupled to the system through input/output controllers 1009. Thevolatile RAM 1005 is typically implemented as dynamic RAM (DRAM) which requires power continuously in order to refresh or maintain the data in the memory. Thenon-volatile memory 1006 is typically a magnetic hard drive, a magnetic optical drive, an optical drive, or a DVD RAM or other type of memory system which maintains data even after power is removed from the system. Typically, the non-volatile memory will also be a random access memory, although this is not required. - While
FIG. 10 shows that the non-volatile memory is a local device coupled directly to the rest of the components in the data processing system, the present invention may utilize a non-volatile memory which is remote from the system; such as, a network storage device which is coupled to the data processing system through a network interface such as a modem or Ethernet interface. Thebus 1002 may include one or more buses connected to each other through various bridges, controllers, and/or adapters, as is well-known in the art. In one embodiment, the I/O controller 1009 includes a USB (Universal Serial Bus) adapter for controlling USB peripherals. Alternatively, I/O controller 1009 may include an IEEE-1394 adapter, also known as FireWire adapter, for controlling FireWire devices. - According to certain embodiments of the invention,
system 1000 further include a battery (not shown) which may be charged or recharged by a solar power source (not shown) having one or more solar cells or arrays, which may be integrated withsystem 1000 or alternatively, external tosystem 1000 using some or more of the techniques described above. Further, the battery ofsystem 1000 may be charged or recharged using power derived from a variety of power sources including, but is not limited to, a network connection (e.g., Ethernet), a USB (universal serial bus) connection, or an IEEE 1394 compatible connection, also referred to as Firewire), a telephone line (not shown), or a combination of any of these power sources. Other configurations may exist. - Some portions of the preceding detailed descriptions have been presented in terms of algorithms and symbolic representations of operations on data bits within a computer memory. These algorithmic descriptions and representations are the ways used by those skilled in the data processing arts to most effectively convey the substance of their work to others skilled in the art. An algorithm is here, and generally, conceived to be a self-consistent sequence of operations leading to a desired result. The operations are those requiring physical manipulations of physical quantities. Usually, though not necessarily, these quantities take the form of electrical or magnetic signals capable of being stored, transferred, combined, compared, and otherwise manipulated. It has proven convenient at times, principally for reasons of common usage, to refer to these signals as bits, values, elements, symbols, characters, terms, numbers, or the like.
- It should be borne in mind, however, that all of these and similar terms are to be associated with the appropriate physical quantities and are merely convenient labels applied to these quantities. Unless specifically stated otherwise as apparent from the above discussion, it is appreciated that throughout the description, discussions utilizing terms such as “processing” or “computing” or “calculating” or “determining” or “displaying” or the like, refer to the action and processes of a computer system, or similar electronic computing device, that manipulates and transforms data represented as physical (electronic) quantities within the computer system's registers and memories into other data similarly represented as physical quantities within the computer system memories or registers or other such information storage, transmission or display devices.
- Embodiments of the present invention also relate to an apparatus for performing the operations herein. This apparatus may be specially constructed for the required purposes, or it may comprise a general-purpose computer selectively activated or reconfigured by a computer program stored in the computer. Such a computer program may be stored in a computer readable storage medium, such as, but is not limited to, any type of disk including floppy disks, optical disks, CD-ROMs, and magnetic-optical disks, read-only memories (ROMs), random access memories (RAMs), erasable programmable ROMs (EPROMs), electrically erasable programmable ROMs (EEPROMs), magnetic or optical cards, or any type of media suitable for storing electronic instructions, and each coupled to a computer system bus.
- The algorithms and displays presented herein are not inherently related to any particular computer or other apparatus. Various general-purpose systems may be used with programs in accordance with the teachings herein, or it may prove convenient to construct more specialized apparatus to perform the required method operations. The required structure for a variety of these systems will appear from the description below. In addition, embodiments of the present invention are not described with reference to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of embodiments of the invention as described herein.
- A machine-readable medium may include any mechanism for storing or transmitting information in a form readable by a machine (e.g., a computer). For example, a machine-readable medium includes read only memory (“ROM”); random access memory (“RAM”); magnetic disk storage media; optical storage media; flash memory devices; electrical, optical, acoustical or other form of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc.); etc.
- In the foregoing specification, embodiments of the invention have been described with reference to specific exemplary embodiments thereof. It will be evident that various modifications may be made thereto without departing from the broader spirit and scope of the invention as set forth in the following claims. The specification and drawings are, accordingly, to be regarded in an illustrative sense rather than a restrictive sense.
Claims (32)
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Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100013309A1 (en) * | 2008-07-18 | 2010-01-21 | Apple Inc | Power management circuitry and solar cells |
US20100282312A1 (en) * | 2009-05-08 | 2010-11-11 | Tzu-Wei Lin | Electronic device housing with solar paint and manufacturing method thereof |
US20100321837A1 (en) * | 2008-01-14 | 2010-12-23 | Matteo Caiti | Electronic protection unit for automatic circuit breakers and relative process |
US20110058627A1 (en) * | 2009-09-04 | 2011-03-10 | Apple Inc. | Use of rds data to select matching network |
US20110133787A1 (en) * | 2009-12-07 | 2011-06-09 | Ball Alan R | Circuit and method for determining a current |
US20110210614A1 (en) * | 2010-02-26 | 2011-09-01 | Byeong-Seon Min | Power storage system and method of controlling the same |
US20120086804A1 (en) * | 2010-04-19 | 2012-04-12 | Sony Corporation | Imaging apparatus and method of controlling the same |
US20120299529A1 (en) * | 2009-12-31 | 2012-11-29 | Guo Guangxi | Solar charger for charging power battery |
CN103326414A (en) * | 2012-03-23 | 2013-09-25 | 精工电子有限公司 | Semiconductor device including charging system |
US20130249288A1 (en) * | 2010-12-08 | 2013-09-26 | Panasonic Corporation | Power supply circuit, power supply method and power supply system |
EP2670015A1 (en) * | 2011-03-15 | 2013-12-04 | Omron Corporation | Power control device and power control method |
US20150001945A1 (en) * | 2012-10-26 | 2015-01-01 | Christopher A. Estes | Solar Power Generation, Distribution, and Communication System |
GB2517585A (en) * | 2013-07-15 | 2015-02-25 | Univ Plymouth | Control arrangement |
US9444397B2 (en) | 2012-10-26 | 2016-09-13 | Sunculture Solar, Inc. | Integrated solar panel |
US20170005507A1 (en) * | 2010-12-21 | 2017-01-05 | AltEn, LLC | Power metering and control system adaptable to multi-standard device |
US9620993B2 (en) | 2012-10-26 | 2017-04-11 | Solpad, Inc. | Auto-synchronous isolated inlet power converter |
US20170256532A1 (en) * | 2011-04-25 | 2017-09-07 | Volterra Semiconductor Corporation | Integrated protection devices with monitoring of electrical characteristics |
US20170264123A1 (en) * | 2016-03-09 | 2017-09-14 | Servato Corporation | Battery management system and related techniques for adaptive, dynamic control of battery charging |
US9948139B2 (en) | 2012-10-26 | 2018-04-17 | Solpad, Inc. | Solar power generation, distribution, and communication system |
US10050668B1 (en) * | 2012-04-20 | 2018-08-14 | Securus Technologies, Inc. | Integrated network devices utilizing low-power technologies |
US20180332538A1 (en) * | 2016-01-25 | 2018-11-15 | Huawei Technologies Co., Ltd. | Terminal Device |
US20210141406A1 (en) * | 2018-07-25 | 2021-05-13 | Healables, Ltd. | Regulated current power source |
US20210328547A1 (en) * | 2018-08-28 | 2021-10-21 | Lg Innotek Co., Ltd. | Dc-dc converter for photovoltaic energy storage system and method for controlling same |
Families Citing this family (62)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10693415B2 (en) | 2007-12-05 | 2020-06-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US11881814B2 (en) | 2005-12-05 | 2024-01-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US8319483B2 (en) | 2007-08-06 | 2012-11-27 | Solaredge Technologies Ltd. | Digital average input current control in power converter |
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US8013472B2 (en) | 2006-12-06 | 2011-09-06 | Solaredge, Ltd. | Method for distributed power harvesting using DC power sources |
US11735910B2 (en) | 2006-12-06 | 2023-08-22 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
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US8618692B2 (en) | 2007-12-04 | 2013-12-31 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
US9088178B2 (en) | 2006-12-06 | 2015-07-21 | Solaredge Technologies Ltd | Distributed power harvesting systems using DC power sources |
US9112379B2 (en) | 2006-12-06 | 2015-08-18 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
US9130401B2 (en) | 2006-12-06 | 2015-09-08 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11687112B2 (en) | 2006-12-06 | 2023-06-27 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11569659B2 (en) | 2006-12-06 | 2023-01-31 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11855231B2 (en) | 2006-12-06 | 2023-12-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11728768B2 (en) | 2006-12-06 | 2023-08-15 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
US8947194B2 (en) | 2009-05-26 | 2015-02-03 | Solaredge Technologies Ltd. | Theft detection and prevention in a power generation system |
US8319471B2 (en) | 2006-12-06 | 2012-11-27 | Solaredge, Ltd. | Battery power delivery module |
US11309832B2 (en) | 2006-12-06 | 2022-04-19 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11296650B2 (en) | 2006-12-06 | 2022-04-05 | Solaredge Technologies Ltd. | System and method for protection during inverter shutdown in distributed power installations |
US11888387B2 (en) | 2006-12-06 | 2024-01-30 | Solaredge Technologies Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
US11264947B2 (en) | 2007-12-05 | 2022-03-01 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US8289742B2 (en) | 2007-12-05 | 2012-10-16 | Solaredge Ltd. | Parallel connected inverters |
EP3496258A1 (en) | 2007-12-05 | 2019-06-12 | Solaredge Technologies Ltd. | Safety mechanisms in distributed power installations |
US8049523B2 (en) | 2007-12-05 | 2011-11-01 | Solaredge Technologies Ltd. | Current sensing on a MOSFET |
WO2009072075A2 (en) | 2007-12-05 | 2009-06-11 | Solaredge Technologies Ltd. | Photovoltaic system power tracking method |
EP2269290B1 (en) | 2008-03-24 | 2018-12-19 | Solaredge Technologies Ltd. | Switch mode converter including active clamp for achieving zero voltage switching |
EP2294669B8 (en) | 2008-05-05 | 2016-12-07 | Solaredge Technologies Ltd. | Direct current power combiner |
US8400134B2 (en) * | 2009-11-12 | 2013-03-19 | Intersil Americas Inc. | Apparatus and methodology for maximum power point tracking for a solar panel |
US10673222B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US10673229B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
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US10230310B2 (en) | 2016-04-05 | 2019-03-12 | Solaredge Technologies Ltd | Safety switch for photovoltaic systems |
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GB2483317B (en) | 2011-01-12 | 2012-08-22 | Solaredge Technologies Ltd | Serially connected inverters |
KR20120114019A (en) * | 2011-04-06 | 2012-10-16 | 삼성디스플레이 주식회사 | Electric device using a solar cell |
US8570005B2 (en) | 2011-09-12 | 2013-10-29 | Solaredge Technologies Ltd. | Direct current link circuit |
US20130141070A1 (en) * | 2011-12-01 | 2013-06-06 | Intersil Americas LLC | Control system and method for shared inductor regulator |
US20130147455A1 (en) * | 2011-12-12 | 2013-06-13 | Yang Pan | Power Management Method for Operating Electronic Device with Solar Energy |
GB2498365A (en) | 2012-01-11 | 2013-07-17 | Solaredge Technologies Ltd | Photovoltaic module |
GB2498791A (en) | 2012-01-30 | 2013-07-31 | Solaredge Technologies Ltd | Photovoltaic panel circuitry |
US9853565B2 (en) | 2012-01-30 | 2017-12-26 | Solaredge Technologies Ltd. | Maximized power in a photovoltaic distributed power system |
GB2498790A (en) | 2012-01-30 | 2013-07-31 | Solaredge Technologies Ltd | Maximising power in a photovoltaic distributed power system |
GB2499991A (en) | 2012-03-05 | 2013-09-11 | Solaredge Technologies Ltd | DC link circuit for photovoltaic array |
US9348388B2 (en) * | 2012-04-27 | 2016-05-24 | Apple Inc. | Power management systems for accepting adapter and solar power in electronic devices |
US10115841B2 (en) | 2012-06-04 | 2018-10-30 | Solaredge Technologies Ltd. | Integrated photovoltaic panel circuitry |
TWI482404B (en) * | 2012-10-05 | 2015-04-21 | Anpec Electronics Corp | Current-limit system and method |
US9941813B2 (en) | 2013-03-14 | 2018-04-10 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
US9548619B2 (en) | 2013-03-14 | 2017-01-17 | Solaredge Technologies Ltd. | Method and apparatus for storing and depleting energy |
EP4318001A3 (en) | 2013-03-15 | 2024-05-01 | Solaredge Technologies Ltd. | Bypass mechanism |
JP6018980B2 (en) * | 2013-07-05 | 2016-11-02 | 株式会社日立製作所 | Free standing power system |
KR20150073680A (en) * | 2013-12-23 | 2015-07-01 | 한국전자통신연구원 | Apparatus and method of tracking maximum power |
US9318974B2 (en) | 2014-03-26 | 2016-04-19 | Solaredge Technologies Ltd. | Multi-level inverter with flying capacitor topology |
CN105760964A (en) * | 2016-03-15 | 2016-07-13 | 国网浙江省电力公司电力科学研究院 | Microgrid optimal configuration method and device |
US11018623B2 (en) | 2016-04-05 | 2021-05-25 | Solaredge Technologies Ltd. | Safety switch for photovoltaic systems |
US11177663B2 (en) | 2016-04-05 | 2021-11-16 | Solaredge Technologies Ltd. | Chain of power devices |
US11962157B2 (en) | 2018-08-29 | 2024-04-16 | Sean Walsh | Solar power distribution and management for high computational workloads |
US11967826B2 (en) | 2017-12-05 | 2024-04-23 | Sean Walsh | Optimization and management of power supply from an energy storage device charged by a renewable energy source in a high computational workload environment |
US11929622B2 (en) | 2018-08-29 | 2024-03-12 | Sean Walsh | Optimization and management of renewable energy source based power supply for execution of high computational workloads |
US11994886B2 (en) | 2021-12-17 | 2024-05-28 | ONiO AS | Power saving in an embedded system |
NO347294B1 (en) * | 2021-12-17 | 2023-09-04 | ONiO AS | Power Saving in an Embedded System |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20010040560A1 (en) * | 1998-08-20 | 2001-11-15 | Alan Amron | Video display document |
US20060164065A1 (en) * | 2005-01-24 | 2006-07-27 | Linear Technology Corporation | System and method for tracking a variable characteristic through a range of operation |
US20070040540A1 (en) * | 2003-09-29 | 2007-02-22 | Xantrex Technology Inc. | Method and apparatus for controlling power drawn from an energy converter |
US7208928B2 (en) * | 2000-03-22 | 2007-04-24 | The Board Of Trustrees Of The University Of Illinois | Oscillatorless DC-DC power converter |
US7412612B2 (en) * | 2004-02-24 | 2008-08-12 | Delphi Technologies, Inc. | Dynamically optimized power converter |
US20080309095A1 (en) * | 2006-11-29 | 2008-12-18 | Sunpower, Inc., | Electronic Controller Matching Engine Power To Alternator Power And Maintaining Engine Frequency For A Free-Piston Stirling Engine Driving A Linear Alternator |
US7514900B2 (en) * | 2006-10-06 | 2009-04-07 | Apple Inc. | Portable devices having multiple power interfaces |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6057665A (en) * | 1998-09-18 | 2000-05-02 | Fire Wind & Rain Technologies Llc | Battery charger with maximum power tracking |
US20060132102A1 (en) * | 2004-11-10 | 2006-06-22 | Harvey Troy A | Maximum power point tracking charge controller for double layer capacitors |
-
2006
- 2006-10-06 US US11/544,103 patent/US8004113B2/en active Active
-
2011
- 2011-08-15 US US13/210,170 patent/US9231435B2/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20010040560A1 (en) * | 1998-08-20 | 2001-11-15 | Alan Amron | Video display document |
US7208928B2 (en) * | 2000-03-22 | 2007-04-24 | The Board Of Trustrees Of The University Of Illinois | Oscillatorless DC-DC power converter |
US20070040540A1 (en) * | 2003-09-29 | 2007-02-22 | Xantrex Technology Inc. | Method and apparatus for controlling power drawn from an energy converter |
US7412612B2 (en) * | 2004-02-24 | 2008-08-12 | Delphi Technologies, Inc. | Dynamically optimized power converter |
US20060164065A1 (en) * | 2005-01-24 | 2006-07-27 | Linear Technology Corporation | System and method for tracking a variable characteristic through a range of operation |
US7514900B2 (en) * | 2006-10-06 | 2009-04-07 | Apple Inc. | Portable devices having multiple power interfaces |
US20090179611A1 (en) * | 2006-10-06 | 2009-07-16 | Apple Inc. | Portable devices having multiple power interfaces |
US20080309095A1 (en) * | 2006-11-29 | 2008-12-18 | Sunpower, Inc., | Electronic Controller Matching Engine Power To Alternator Power And Maintaining Engine Frequency For A Free-Piston Stirling Engine Driving A Linear Alternator |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100321837A1 (en) * | 2008-01-14 | 2010-12-23 | Matteo Caiti | Electronic protection unit for automatic circuit breakers and relative process |
US8587149B2 (en) * | 2008-01-14 | 2013-11-19 | Abb S.P.A. | Electronic protection unit for automatic circuit breakers and relative process |
US20100013309A1 (en) * | 2008-07-18 | 2010-01-21 | Apple Inc | Power management circuitry and solar cells |
US8022571B2 (en) | 2008-07-18 | 2011-09-20 | Apple Inc. | Power management circuitry and solar cells |
US20100282312A1 (en) * | 2009-05-08 | 2010-11-11 | Tzu-Wei Lin | Electronic device housing with solar paint and manufacturing method thereof |
US8519259B2 (en) | 2009-05-08 | 2013-08-27 | Asustek Computer Inc. | Electronic device housing with solar paint and manufacturing method thereof |
US20110058627A1 (en) * | 2009-09-04 | 2011-03-10 | Apple Inc. | Use of rds data to select matching network |
US8948310B2 (en) | 2009-09-04 | 2015-02-03 | Apple Inc. | Use of RDS data to select matching network |
US20110133787A1 (en) * | 2009-12-07 | 2011-06-09 | Ball Alan R | Circuit and method for determining a current |
US8143923B2 (en) * | 2009-12-07 | 2012-03-27 | Semiconductor Components Industries, Llc | Circuit and method for determining a current |
US10270282B2 (en) * | 2009-12-31 | 2019-04-23 | Shenzhen Byd Auto R&D Company Limited | Solar charger comprising a charging unit for charging a power battery to a high voltage, a photo-sensitive unit for detecting light intensity, a switch unit for regulating connection between the charging unit and the power battery, and a control unit for regulating the charging of the power battery based on a saturation level and the light intensity |
US20120299529A1 (en) * | 2009-12-31 | 2012-11-29 | Guo Guangxi | Solar charger for charging power battery |
US20110210614A1 (en) * | 2010-02-26 | 2011-09-01 | Byeong-Seon Min | Power storage system and method of controlling the same |
US8456878B2 (en) | 2010-02-26 | 2013-06-04 | Samsung Sdi Co., Ltd. | Power storage system and method of controlling the same |
US20120086804A1 (en) * | 2010-04-19 | 2012-04-12 | Sony Corporation | Imaging apparatus and method of controlling the same |
US20130249288A1 (en) * | 2010-12-08 | 2013-09-26 | Panasonic Corporation | Power supply circuit, power supply method and power supply system |
US9490636B2 (en) * | 2010-12-08 | 2016-11-08 | Panasonic Intellectual Property Management Co., Ltd. | Power supply circuit, power supply method and power supply system |
US10361582B2 (en) * | 2010-12-21 | 2019-07-23 | Power Practical, Inc. | Power metering and control system adaptable to multi-standard device |
US20170005507A1 (en) * | 2010-12-21 | 2017-01-05 | AltEn, LLC | Power metering and control system adaptable to multi-standard device |
EP2670015A1 (en) * | 2011-03-15 | 2013-12-04 | Omron Corporation | Power control device and power control method |
EP2670015A4 (en) * | 2011-03-15 | 2014-05-07 | Omron Tateisi Electronics Co | Power control device and power control method |
US20170256532A1 (en) * | 2011-04-25 | 2017-09-07 | Volterra Semiconductor Corporation | Integrated protection devices with monitoring of electrical characteristics |
US9343915B2 (en) * | 2012-03-23 | 2016-05-17 | Sii Semiconductor Corporation | Semiconductor device including charging system |
CN103326414A (en) * | 2012-03-23 | 2013-09-25 | 精工电子有限公司 | Semiconductor device including charging system |
TWI578663B (en) * | 2012-03-23 | 2017-04-11 | Sii Semiconductor Corp | A semiconductor device having a charging system |
US20130249473A1 (en) * | 2012-03-23 | 2013-09-26 | Seiko Instruments Inc. | Semiconductor device including charging system |
KR101918302B1 (en) * | 2012-03-23 | 2018-11-13 | 에이블릭 가부시키가이샤 | Semiconductor device including charging system |
US10050668B1 (en) * | 2012-04-20 | 2018-08-14 | Securus Technologies, Inc. | Integrated network devices utilizing low-power technologies |
US9312724B2 (en) * | 2012-10-26 | 2016-04-12 | Sunculture Solar Inc. | Solar power generation, distribution, and communication system |
US9620993B2 (en) | 2012-10-26 | 2017-04-11 | Solpad, Inc. | Auto-synchronous isolated inlet power converter |
US9444397B2 (en) | 2012-10-26 | 2016-09-13 | Sunculture Solar, Inc. | Integrated solar panel |
US20150001945A1 (en) * | 2012-10-26 | 2015-01-01 | Christopher A. Estes | Solar Power Generation, Distribution, and Communication System |
US9948139B2 (en) | 2012-10-26 | 2018-04-17 | Solpad, Inc. | Solar power generation, distribution, and communication system |
GB2517585B (en) * | 2013-07-15 | 2017-05-03 | Univ Plymouth | Control arrangement |
US9742290B2 (en) | 2013-07-15 | 2017-08-22 | University Of Plymouth | Control arrangement for increasing the available output from a source |
GB2517585A (en) * | 2013-07-15 | 2015-02-25 | Univ Plymouth | Control arrangement |
US20180332538A1 (en) * | 2016-01-25 | 2018-11-15 | Huawei Technologies Co., Ltd. | Terminal Device |
US10638429B2 (en) * | 2016-01-25 | 2020-04-28 | Huawei Technologies Co., Ltd. | Terminal device with a power supply control during emergency communication |
US20170264123A1 (en) * | 2016-03-09 | 2017-09-14 | Servato Corporation | Battery management system and related techniques for adaptive, dynamic control of battery charging |
US11128158B2 (en) * | 2016-03-09 | 2021-09-21 | Servato Corp. | Battery management system and related techniques for adaptive, dynamic control of battery charging |
US20210141406A1 (en) * | 2018-07-25 | 2021-05-13 | Healables, Ltd. | Regulated current power source |
US11493943B2 (en) * | 2018-07-25 | 2022-11-08 | Healables, Ltd. | Systems, devices, and methods for providing a regulated current to a varying resistive load |
US20210328547A1 (en) * | 2018-08-28 | 2021-10-21 | Lg Innotek Co., Ltd. | Dc-dc converter for photovoltaic energy storage system and method for controlling same |
US11916512B2 (en) * | 2018-08-28 | 2024-02-27 | Lg Innotek Co., Ltd. | DC-DC converter for photovoltaic energy storage system and method for controlling same |
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US9231435B2 (en) | 2016-01-05 |
US8004113B2 (en) | 2011-08-23 |
US20110298431A1 (en) | 2011-12-08 |
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